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International Journal of Automotive Technology 2004;5(1): 17-22. |
| EXPERIMENTAL STUDY ON TURBULENT SWIRLING FLOW IN A CYLINDRICAL ANNULI BY USING THE PIV TECHNIQUE |
| T.-H. CHANG |
| Kyungnam University |
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| ABSTRACT |
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An experimental investigation was conducted to study the characteristics of turbulent swirling flow in an axisymmetric annuli. The swirl angle measurements were performed using a flow visualization technique using smoke and dye liquid for Re=60,000-80,000. Using the two-dimensional Particle Image Velocimetry method, this study found the time-mean velocity distribution and turbulence intensity in water with swirl for Re=20,000, 30,000, and 40,000 along longitudinal sections. There were neutral points for equal axial velocity at y/(R-r)=0.7-0.75, and the highest axial velocity was recorded near y/(R-r)=0.9. Negative axial velocity was observed near the convex tube along X/(D-d)=3.0-18.0 for Re=20,000. |
| Key Words:
Annuli, PIV, Concave tube, Convex tube, Swirl flow angle |
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